All I see is the simple empty square that the majority of fonts display for any character not recognized.

My browser receives it as Unicode Character 26A7. In my copy of Unicode 4 character tables (downloaded some time ago) there is no character defined for that code number. The last (highest) number in the 26?? chart is 26A1, which should show you the "high voltage sign" - a zig-zag three segment "spark" representation ⚡- which does NOT display in my preview.

The series from 2600 through 26FF is defined as "Miscellaneous Symbols" and does NOT HAVE characters assigned for about 30% of the "numbers" in the range. Few of the characters from this range will work without the reader of your document having "special" fonts, although a few have been mapped in my IE7 - US English - Times New Roman setup. I'm not sure that my Unicode Char Tables are the latest, but since nobody who wants to communicate should be using these chars, I havent' bothered to check for updates. They're okay to play with; but unless you confirm that those reading your messages will be able to see them, it's a bit childish to try to post them.

ALL ASSIGNED CHARACTERS have names. If you can provide the name of a glyph or its Unicode Hex Nuber, for something that you need to be able to post to convey an important message, one or more of us may be able to help find a method that will work for most people, although it's impossible to guarantee that "out of range" chars will be seen by everyone.

The following chars in teh 2600 to 26FF range are defined and display in my preview, but may not show as anythings but a "char unknown" symbol in your browser. (These are just samples selected at random.)

☠ ♔ ♕ ♖ ♗

John